Level 1

Speed/Drag - Double an ally's agility

Slow - Cause an enemy to move at half speed. Doesn't always work

Regen - Cause an ally to slowly regain HP

Level 2

Mute/Void - Prevents your party from casting spells, and, if you're lucky, prevents the enemy from doing so as well

Fast/Haste - Double an ally's speed

Float - Make an ally/whole party float in the air, making them immune to Quake spells

Level 3

Demi - Reduce an enemy's HP by 1/2. Doesn't always work

Stop - Freeze an enemy in his tracks

Exit - Flee from a battle or from a dungeon. Still can't run from all battles

Level 4

Comet - Damage 1 enemy

Slow2 - Cause all enemies to move at half speed. Doesn't always work on all enemies

Retrn/Reset - Go back to the beginning of the battle

Level 5

Qrter - Reduce an enemy's HP by 3/4. Doesn't always work

Fast2/Hast2 - Cause your whole party to move at double speed

Old - Cause an enemy to age. Doesn't always work

Level 6

Meteo - Blast 4 enemies randomly

Quick - Caster can do double commands. Great to combine with XFight and Fast

XZone - Throw an enemy into the Cleft of Dimension. Still works in the Cleft of Dimension, doesn't always work